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Synchronization and channel coding in shallow water acoustic communication

机译:浅水声通信中的同步与信道编码

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GESMA's (Groupe d'Etudes Sous-Marines de l'Atlantique) objective is to develop a sufficiently robust acoustic link allowing the transmission of different information (text, images...). A real-time platform named TRIDENT (TRansmission d'Images et de Donnes EN Temps reel) was designed at TELECOM Bretagne. A blind spatio-temporal equalizer is used to reduce the various perturbations caused by the underwater acoustic channel (UWA). The acoustic link performance was evaluated and its robustness for transmission shown in a strongly disturbed channel. GESMA also wants to increase the link reliability. In order to do so, a channel coding was added to the system. Different kinds of error correcting schemes were tested including Convolutional Codes (CC) and Reed Solomon (RS) block code. Correlation strategies are used to solve both phase ambiguity and frame synchronization before channel decoding.
机译:Gesma的(Groupe d'Etudes Sous-Marines de l'Atlantique)目标是开发一种充分强大的声学链接,允许传输不同的信息(文本,图像......)。在Telecom Bretagne设计了一个名为Trident的实时平台(传输D'Images et de donnes en temps reel)。盲时空均衡器用于减少由水下声道(UWA)引起的各种扰动。评估声学链路性能,其稳健的频道中显示的鲁棒性。 Gesma还希望提高链路可靠性。为此,将信道编码添加到系统中。测试了不同类型的纠错方案,包括卷积码(CC)和REED所罗门(RS)块代码。相关策略用于解决信道解码前的相位模糊和帧同步。

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